澳门永久免费人成电影网站-成人免播放器午夜视频-欧美一级特黄大片做受在-成人av影片在线观看-中文字幕亚洲电影-人人澡人人澡人人看添欧美-国产日韩欧美在线免费

1. The anchoring engineering of hydropower, mine, dam body and road subgrade is mainly based on skid-type light hydraulic anchor and drilling rig. The anchoring engineering of mine is mainly based on rock anchor, which requires high accuracy of hole formation, generally, it is necessary to work on the scaffold about ten meters high, so it is necessary to ensure that the rig is flexible and convenient to move on the scaffold, and also take into account the stability when the rig is perforated, and it is easy to connect with the scaffold stably, generally, skid-type I drilling rig should be adopted with a weight of about 1.6 tons and a rotary torque of about 3.OkNm and propulsion lifting force of about 5 tons are more suitable; Air down-the-hole hammer is the most effective method for rock drilling.

2. Deep foundation pit anchor of high-rise buildings the same project is mainly crawler self-propelled full hydraulic anchor drilling rig because the foundation pit formation of urban buildings is mainly sand plus strap gravel, and generally drilling takes water as the power of slag removal and hole cleaning. Therefore, even if precipitation is carried out, the working site is relatively muddy. Only suitable crawler drilling rig is equipped with hydraulic rock Bud machine or high torque rotary drilling, with a machine weight of about 8 tons, a rotary torque of about 700kgm and a lifting force of about 8 tons.

3. Anchor Drilling machine supporting drilling tools to the direction of the combination of soil drilling tools and rock anchor drilling tools. In the Three Gorges permanent ship lock dam anchor cable drilling project, the drilling rig with the best hole formation degree is the drill developed by using the principle of drilling the soil anchor casing into the medium stability and wall protection, which is applied to the direction of the drill pipe in the drilling of rock anchor eye. {similarly, in order to solve the problems that the drilling efficiency of hydraulic stroke drilling rig is lower than that of soil exploration anchor eye and the casing drilling tool is seriously damaged, the air down-the-hole hammer countercore reaming Casing Drilling tool under experimental research, it is also another combination of soil anchor drill and rock anchor drill

4. Select pavement engineering machinery alarm basic parts

At present, anchor drilling machine imported from four-wheel chassis to internal combustion engine, hydraulic pump, hydraulic cylinder, hydraulic valve, control and operating system all refer to or adopt common basic parts of pavement engineering machinery, this is the direction that many domestic manufacturers should learn from and improve, and it is also a fast and effective way for domestic anchor drilling machine to reduce costs and improve reliability.